<?php

namespace Codedivo\AdminOptimizer\Features;

if ( ! defined( 'ABSPATH' ) ) exit;

use Codedivo\AdminOptimizer\Core\SettingsManager;
use Codedivo\AdminOptimizer\Traits\Singleton;

class PerformanceBooster {
    use Singleton;

    private $settings;

    public function __construct() {
        $this->settings = SettingsManager::get_instance();
        $this->init_hooks();
    }

    private function get_setting($key, $default = '') {
        return $this->settings->get('speed_boost', $key, $default);
    }

    private function init_hooks() {
        if ($this->get_setting('disable_emojis')) {
            add_action('init', [$this, 'disable_emojis']);
        }
        
        if ($this->get_setting('disable_embeds')) {
            add_action('init', [$this, 'disable_embeds']);
        }
        
        if ($this->get_setting('limit_revisions')) {
            add_filter('wp_revisions_to_keep', [$this, 'limit_revisions'], 10, 2);
        }
        
        if ($this->get_setting('heartbeat_control')) {
            add_action('init', [$this, 'control_heartbeat'], 1);
        }
        
        if ($this->get_setting('remove_query_strings')) {
            add_filter('style_loader_src', [$this, 'remove_query_strings'], 10, 2);
            add_filter('script_loader_src', [$this, 'remove_query_strings'], 10, 2);
        }
    }

    public function disable_emojis() {
        remove_action('wp_head', 'print_emoji_detection_script', 7);
        remove_action('admin_print_scripts', 'print_emoji_detection_script');
        remove_action('wp_print_styles', 'print_emoji_styles');
        remove_action('admin_print_styles', 'print_emoji_styles');
        remove_filter('the_content_feed', 'wp_staticize_emoji');
        remove_filter('comment_text_rss', 'wp_staticize_emoji');
        remove_filter('wp_mail', 'wp_staticize_emoji_for_email');
    }

    public function disable_embeds() {
        global $wp;
        $wp->public_query_vars = array_diff($wp->public_query_vars, ['embed']);
        remove_action('rest_api_init', 'wp_oembed_register_route');
        add_filter('embed_oembed_discover', '__return_false');
        remove_filter('oembed_dataparse', 'wp_filter_oembed_result', 10);
        remove_action('wp_head', 'wp_oembed_add_discovery_links');
        remove_action('wp_head', 'wp_oembed_add_host_js');
    }

    public function limit_revisions($num, $post) {
        $limit = (int) $this->get_setting('revision_limit', 5);
        return $limit;
    }

    public function control_heartbeat() {
        $freq = $this->get_setting('heartbeat_frequency', 60);
        if ($freq == 0) {
            wp_deregister_script('heartbeat');
            return;
        }
        
        add_filter('heartbeat_settings', function($settings) use ($freq) {
            $settings['interval'] = $freq;
            return $settings;
        });
    }
    
    public function remove_query_strings($src) {
        if (strpos($src, '?ver=')) {
            $src = remove_query_arg('ver', $src);
        }
        return $src;
    }

    public function render_settings() {
        $settings = [
            'disable_emojis' => ['type' => 'checkbox', 'label' => __('Disable Emojis', 'admin-menu-optimizer')],
            'disable_embeds' => ['type' => 'checkbox', 'label' => __('Disable Embeds', 'admin-menu-optimizer')],
            'remove_query_strings' => ['type' => 'checkbox', 'label' => __('Remove Query Strings from Static Resources', 'admin-menu-optimizer')],
            'limit_revisions' => ['type' => 'checkbox', 'label' => __('Limit Post Revisions', 'admin-menu-optimizer')],
            'revision_limit' => ['type' => 'number', 'label' => __('Number of Revisions to Keep', 'admin-menu-optimizer')],
            'heartbeat_control' => ['type' => 'checkbox', 'label' => __('Control Heartbeat API', 'admin-menu-optimizer')],
            'heartbeat_frequency' => ['type' => 'select', 'label' => __('Heartbeat Frequency', 'admin-menu-optimizer'), 'options' => [
                '15' => '15 Seconds',
                '30' => '30 Seconds',
                '60' => '60 Seconds',
                '0' => 'Disable Heartbeat'
            ]],
        ];

        echo '<table class="form-table" role="presentation">';
        foreach ($settings as $key => $field) {
            $value = $this->get_setting($key);
            echo '<tr>';
            echo '<th scope="row">' . esc_html($field['label']) . '</th>';
            echo '<td>';
            if ($field['type'] === 'checkbox') {
                echo '<input type="checkbox" name="speed_boost[' . esc_attr($key) . ']" value="1" ' . checked(1, $value, false) . ' />';
            } elseif ($field['type'] === 'number') {
                echo '<input type="number" name="speed_boost[' . esc_attr($key) . ']" value="' . esc_attr($value) . '" class="small-text" />';
            } elseif ($field['type'] === 'select') {
                echo '<select name="speed_boost[' . esc_attr($key) . ']">';
                foreach ($field['options'] as $opt_val => $opt_label) {
                    echo '<option value="' . esc_attr($opt_val) . '" ' . selected($opt_val, $value, false) . '>' . esc_html($opt_label) . '</option>';
                }
                echo '</select>';
            }
            echo '</td>';
            echo '</tr>';
        }
        echo '</table>';
    }
}